Machine for making paper vessels.



L. NORMAN.

MACHINE FOR MAKING PAPER VESSELS.

APPLICATION FILED FEB 1%1913.

Patented Nov. 2, 1915.

2 sHEET's-sHEET I.

L. NORMAN.

MACHINE FOR MAKING PAPER VESSELS. APPLICATION FILED FEB. 14. I913.

Patented Nov. 2, 1915.

Z SHEETS-SHEET 2.

LIONEL NORMAN, OF WINCHESTER, MASSACHUSETTS- MACHINE FOR MAKING PAPERVESSELS.

Specification of Letters Patent.

- Patented Nov. a, raw.

Application filed February 14, 1913. Serial No. 748,338.

To all whom it may concern.

Be it known that I, LIONEL NORMAN, a citizen of the United States,residing at Winchester, in the county of Middlesex and State ofMassachusetts, have invented certain new and useful ImprovementsinMachines for Making Paper Vessels; and I do hereby declare the followingtobe a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe The present invention relates to machines for making paper vesselsand is designed particularly for use in the manufacture of paper vesselswhich comprise inner and outer walls, a flanged bottom inserted betweenthe inner and outer walls, and a sealed air chamber between the walls.

The object of the present invention is to provide a simple and eflicientmachine for pressing together the upper and lower edges of the inner andouter walls to seal the walls at their upper and lower edges whileleaving an air chamber between these points.

With this object in view a feature of the present invention contemplatesthe provision in a machine for making paper vessels of a holder toreceive and support the outer wall and inserted flanged bottom of avessel and an expanding plunger cooperating with the holder to force theinner wall of the vessel into engagement with the flange of the bottomand the upper edge of the outer wall. Broadly considered, the plungermay be actuated in any suitable manner to press the inner wall intoengagement with the flange of the bottom and upper edge of the outerwall, but, owing to the increased thickness of the paper at the bottomof the vessel, it is preferred to actuate the plunger to exert a greaterdegree of outward pressure against the lower edge of the inner Wall toforce it into engagement with the flange of the bottom than against theupper edge of the outer wall, and this manner of actuating the plungerforms an additional feature of the invention.

This machine in addition to the features of invention above referred toalso embodies certain novel constructions and arrangements of partshereinafter described and claimed, the advantages of which will beobvious to those skilled in the art from'the I following description.

flanged bottom 4 of tion will be clearly understood from an inspectionofthe accompanying drawings, in which Figure 1 1s a vertical section ofthat portion of a machine for making paper vessels showing the best formof the invention at present known to the inventor; Fig. 2 is a sectionalplan view on the line 2-2 Fig. 1; Fig. 3 is a sectional plan view of theplunger on the line 33 Fig. 1; and Fig. l is a vertlcal section on asmaller scale of the twowalled vessel which the machine is particularlyadapted to make.

The device illustrated in the drawings is provided with a holder toreceive and support the outer wall and inserted flanged bot-l tom of apaper vessel, an expanding plunger cooperating with the holder to forcethe upper edge of the inner wall of the vessel'into engagement with theupper edge of the outer wall, and the lower edge of the inner wall intoengagement with the flange of the bottom and the lower'edge of the outerwall while leaving a sealed air chamber between the inner and outerwalls, an actuator for expanding the plunger, and a hoop acting to forcethe upper edge of the inn er wall flush with the upper edge of the outerwall when the plunger is depressed into the holder, and to strip thevessel from the plunger as the plunger is raised from the holder.

The holder T is provided with aside wall 1 tapering from top to bottomto receive and support the outer wall 2 of a paper vessel, and withabottom 3 to support the inserted the vessel.

The plunger consists of a circular base, four segments mounted to slideradially of the base, a former section pivoted to each seg1ncnt,and apressure bar secured to each former section. The base M of the plungeris a circular plate and supports four segments E, F, G and H slidablyconnected to the base by means of screws 0, 0 0 and 0 the shanks ofwhich are guided in radial slots m, m, m and m in the base plate M. Thesegments are normally maintained collapsed with the apices of thesegments arranged at a common point and are expanded to thecircumference of the inserted flanged bottom of the vessel.

The segments carry former sections A, B, C and D pivoted respectivelybetween lugs y, 3 W, and 3 on the segments E, F, G, and The formersections are normally maintained collapsed with their adjacent verticaledges abutting and are swung about their pivoted connections with thesegments as the segments are moved outwardly to exert outward pressureon the upper and lower edges of the inner wall of the vessel against theupper edge of the outer wall and the flange of the bottom to seal theouter and inner walls at their upper and lower edges while leaving anair chamber between these points. c

The mechanism for sliding the segments E, F, G and H on the base plateM, and swinging the former sections A, B, C and D about their pivotalconnection with the segments, comprises a series of pressure bars N, N,N and N secured respectively to the former, sections A, B, C and D, andan actuator carrying a series of rolls arranged to engage the series ofpressure bars. The bars N. N N and N are respectively provided with aseries of upper inclined surfaces a, m and a series of lower inclinedsurfaces m m, m" and m. In order to seal the inner and outer walls ofthe vessel at their upper and lower edges while leaving an air chamberbetween these points, the upper series of inclined surfaces arearranged, when the plunger is in operative position, site the upperedges of the inner and outer walls and the lower inclined surfaces arearranged opposite the lower edges of the inner and'outer wallsand-theflange of the bottom. The actuator for expanding the plunger comprises aspider J with an upper series of radiating arms 7', 7' 7' and j carryinga series of rolls m, m m and m which are arranged to engage respectivelythe upper series of inclined surfaces 91., n M, and a A second series ofarms 7'", j, radiate from the spider J and carry a second series ofrolls m m arranged to engage respectively the series of lower inclinedsurfaces m, m, m", and m. In order that the actuator and plunger may bemaintained in definite relation to insure the proper engagement of therolls and inclined surfaces, the spider J is provided with a pair oflugs j which embrace the opposite sides of the pressure bar N Theplunger is supported from the spider by a coil spring is, one end ofwhich is suitably secured to the bottom of the spider J and the otherend of which is suitably secured to the top of the plate M.

Owing to the increase in thethickness at the bottom of the "essel wherethe flange of the inserted bottom is interposed between the lower edgesof the inner and outer walls, it is necessary to mold the lower edge ofthe inner wall over the flange of the inserted bottom in order that thevessel may be properly sealed at that point. For that reason greateroutward pressure is required to seal OPPO- the bottom of the vessel thanis required to seal the top of the vessel. To obtain a panding movementof the lower series of rolls than the resistance offered by the upperseries of inclined surfaces to the movement o f the upper series ofrolls with the result that the former sections are pressed outwardlymore at the bottom than at the top.

' The spider is secured to a connecting rod mounted to be reciprocatedby a hub P forming part of the machine, in which the present inventionis designed for use. order that the position of the spider'may beadjusted on the rod the spider is threaded on a sleeve L which isloosely mounted on the, rod belowthe hub P. The sleeve-is provided witha series of sockets arranged for engagement with a tool by which thesleeve maybe turned to adjust the spider vertically on the connectingrod while it is held from rotation by the lugs j cooperating with thepressure bar N The adjusted position of the spider is maintained by ascrew 0:, and a lock-nut P. The spider is connected with each of theformer sections by springs 10 which tend to swing the sections inwardabout the pivotal connection with the segments.

In order that the upper edge of the inner wall of the vessel may beforced flush with the upper edge of the outer wall when the plunger isdepressed into the holder, and the formed vessel stripped from theplunger as the plunger is raised from the holder, the device illustratedin the drawings is provided with a sectional hoop arranged closely aboutthe former sections A, B, C and D. The hoop V is made in four sectionscorrespondingto the former sections A, B, C and D, and each of the hoopsections is slidably con nected b a rod R to a plate Q clamped to thehub by a nut S on the connecting rod K. The top of each section supportsa spring 1" which is coiled around the rod R and bears against thebottom of the plate Q for a purpose which will presently be described.The hoop sections are arranged to expand with the former sections, andcooperate with the springs 10 to collapse the former sections when theexpanding pressure is released. To this end each of the rods R isconnected by a spring 1' with a ring 1- arranged loosely around theSlGt-WG L. As the inner faces of the sections of the hoop are heldpressed against the former sections by the springs T the inner wall ofthe vessel is prevented from getting in between the hoop and the formersections. The bottom of the sectional hoop is thus constrained nseam toact as an abutment to engage the inner wall of the vessel and force theupper edge pf the inner wall flush with the upper edge of the outer Wallas the plunger is depressed into the holder. The downward movement ofthe sectional hoop is limited by the top of the holder T so that duringthe continued actuation of the connecting rod K to expand the plungerthe plate Q slides downward on the rods R and thus places the springs 1'under tension. Upon the reverse movement of the connecting rod K toraise the plunger out of the holder. the stored power of the springs rcontinue to press down upon the formed vessel and strip it from theplunger. The hoop is again elevated when the plate Q engages the collars1' on the ends of the rods R. By limiting the downward movement of thehoop in the manner described excessive pressure tending to crumple thewalls of the vessel is prevented. I C

In the operation of the device illustrated in the drawings the outerwall 1 and flanged bottom 2 of the vessel, either before or after beingassembled, are placed in the holder T, and the inner wall 8 of thevessel is placed in the holder T, inside of the outer wall 1 and flangedbottom 2. Glue or some other adhesive is first placed, before insertingthe parts.in the holder,,on the inner and outer sides of the flange onthe bottom 2 and also.

on the upper inside edge of the outer wall 1,

andv on the lower edge opposite the flange of both the inner and outerwalls respectively so as to cause the proper adhesion of the parts whenthe operation is concluded. While the parts are being assembled in themanner described, the plunger is elevated out of the-holder. The plungeris now moved downward into the holder, and during this downward movementthe upper edge of the inner wall is forced flush with the upper edge ofthe outer wall by the hoop V.

The series of rolls on the spider then roll over the series of inclinedsurfaces on the pressure bars secured to the former sections and theformer sections are moved outwardly to force the inner wall into placeagainst the outer wall at the upper edges of the inner and outer wallsand mold the lower edge of the innerwall over the flange of the insertedbottom, and thus cause adhesion of the parts while leaving a sealedair-chamber between the inner and outer walls. When the vessel is formedthe connecting rod K isactuated in a reverse direction to raise theplunger out of the holder. The plunger is prevented from immediatelyfollowing the. actuator by the springk'which was compressed during theexpanding move-' ment of the plunger, and now serves to maintain theplunger in its expanded position in the holder until the rolls ride oflthe series of pressure bars carried by the former sections. At that timethe plunger is collapsed -hoop is also elevated when the plate Q engagesthe collars r on the rods R. The

formed vessel is then removed and the parts for another vessel assembledin position in the holder.

The nature and scope of the presentinvention having been indicated and amachine embodying the several features of the invention in the best format present known to the inventor having been specifically described,what is claimed is l. A machine for making paper vessels which compriseinner and outer walls, an inserted flanged bottom and a sealed airchamber between the walls, having, in combination, a holder to receivethe outer wall and inserted flanged bottom of the vessel an expandingplunger, and means for expanding the upper and lower portions of theplunger different amounts to exert a different degree of pressure at thelower edges of the inner and outer walls than at the upper edges of theinner and outer Walls to seal the walls at their upper and lower edgeswhile leaving an air chamber between these points, substantially asdescribed.

2. A machine for making vessels, having, in combination, a holder toreceive the vessel, an expanding plunger cooperating with the holder toform the vessel, and means for expanding different portions of theplunger diflerent amounts to cause the plunger to exert diflerentdegrees of pressure at different portions of the vessel, substantiallyas described.

- 3. A machine for making paper vessels which comprise innerand outerwalls, having, in combination, a holder to receive the inner and outerwalls, an expanding plunger cooperating with the holder to sealtheuppervand lower edges of the inner and outer walls while leaving asealed air chamber the formed vessel from the plunger, substantially asdescribed. v

4. A machine for making paper vessels,

between the walls, and a hoop carried by the plunger constructed andarranged to strip 11 5. A machine for making paper vessels,

having, in combination, a plunger provided with a plurality of formingsections having a series of pressure bars secured thereto, and anactuator provided with a series of rolls arranged to engagethe series ofbars and exert outward pressure onthe sections to form the vessel,substantially as describedl 6. A machine for making paper vessels,having, in combination, a plunger provided with a plurality of formingsections each section being providedwith a pressure bar havingdissimilar inclined surfaces, and an actuator provided with a series ofrolls arranged to engage the dissimilar inclined surfaces on the bars,substantially as described.

7. A machine for making paper vessels,-

having, in combination, a holder, and a plunger cooperating with theholder to form the vessel, comprising a base, a series of expandingsegments carried by the base, and a series of formers pivotally mountedon the segments to have a bodily movement with the segments and anindependent pivotal movement, substantially as described. 8. A machinefor making paper having, in combination, a holder to receive the vessel,and a plunger cooperating with the holder to form the vessel, comprisinga base, a series of segments carried by the base, a series of formerspivoted to the segments, and a series of pressure bars secured to theformers, substantially as described.

vessels,

9. A machine for making paper vessels,

having, incombination, a holder to receive .the vessel, a plungercooperatingiwith the holder to form the vessel, a ring surround-' ingthe plunger, and means for storing power on the ring-to cause the-ringto main- -tions of the plunger tain pressure upon the formed vessel andvformed vessel and strip the vessel from the plunger, substantially asdescribed.

11. A machine for making paper vessels, having, in combination, a holderto receive the vessel, a sectional plunger cooperating with the holderto form the vessel, a hoop made in sections corresponding to thesecarranged about the plunger, a vertical rod carried by each section ofthe hoop, a plate sliding on the rods, springs supported by the sectionsof the hoop'coileol about the rods and bearing against the plate, andmeans for causing the plate to tension the springs to maintain pressureon the formed vessel and strip the vessel from the plunger,substantially as described.

LIONEL NORMAN.

Witnesses:

FRED O. FIsH, BURTON W. CARY.

